The problem with the Indian estimates is that they're assuming the Chinese will just go for the runways, and nothing else. If the runways are knocked out, however, the planes are trapped on the ground, and DF-16s can likely have enough force to penetrate the HAS top and explode inside with 700 kg of explosives.
NATO HAS, in general, are designed to withstand a direct hit by a 250 kg bomb. Even the DH-10 cruise missile has a warhead of 500 kg.
And you have to remember, Beijing has Beidou up and India is close enough to its core target territories. Indian EW isn't rated as first-class, so there's no guarantee they can jam DF-16s and DH-10s or CJ-10s, which can have Beidou guidance for high precision.
The Indian assumption seems more like out of the 220 missiles, half will not work, half of the ones that do work will malfunction, half of the ones that work and don't malfunction will not hit their intended targets, and half of the remaining will fail to explode. Or something along those lines LOL. The rest of their assumption is that they can rebuild destroyed bunkers, hangars, and runways within a day, and they are also assuming they have infinite supply and no issues with resupply.
The funny thing is, even if all of that were true, the PLARF can still afford to shut their airfields for the critical days. Minimal IAF presence means IA is quickly knocked out by superior numbers and equipment of PLA with PLAAF holding air superiority and bombing their positions constantly. Enough for PLAAF and PLA to get half way to New Delhi.